Online Material

 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f9.ps}}\end{figure} Figure 8:

Trigger #7688. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f10.ps}}\end{figure} Figure 9:

Trigger #7688. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f11.ps}}\end{figure} Figure 10:

Trigger #5486. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f12.ps}}\end{figure} Figure 11:

Trigger #5486. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f13.ps}}\end{figure} Figure 12:

Trigger #6472. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f14.ps}}\end{figure} Figure 13:

Trigger #6472. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f15.ps}}\end{figure} Figure 14:

Trigger #3481. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f16.ps}}\end{figure} Figure 15:

Trigger #3481. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f17.ps}}\end{figure} Figure 16:

Trigger #3241. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f18.ps}}\end{figure} Figure 17:

Trigger #3241. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f19.ps}}\end{figure} Figure 18:

Trigger #1676. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f20.ps}}\end{figure} Figure 19:

Trigger #1676. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f21.ps}}\end{figure} Figure 20:

Trigger #3663. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f22.ps}}\end{figure} Figure 21:

Trigger #3663. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f23.ps}}\end{figure} Figure 22:

Trigger #3253. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f24.ps}}\end{figure} Figure 23:

Trigger #3253. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f25.ps}}\end{figure} Figure 24:

Trigger #6454. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f26.ps}}\end{figure} Figure 25:

Trigger #6454. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f27.ps}}\end{figure} Figure 26:

Trigger #3057. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f28.ps}}\end{figure} Figure 27:

Trigger #3057. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f29.ps}}\end{figure} Figure 28:

Trigger #4368. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f30.ps}}\end{figure} Figure 29:

Trigger #4368. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f31.ps}}\end{figure} Figure 30:

Trigger #2700. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f32.ps}}\end{figure} Figure 31:

Trigger #2700. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f33.ps}}\end{figure} Figure 32:

Trigger #1157. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f34.ps}}\end{figure} Figure 33:

Trigger #1157. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f35.ps}}\end{figure} Figure 34:

Trigger #6629. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f36.ps}}\end{figure} Figure 35:

Trigger #6629. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f37.ps}}\end{figure} Figure 36:

Trigger #3448. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f38.ps}}\end{figure} Figure 37:

Trigger #3448. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f39.ps}}\end{figure} Figure 38:

Trigger #3301. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f40.ps}}\end{figure} Figure 39:

Trigger #3301. Color code and description as in Fig. 4b.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f41.ps}}\end{figure} Figure 40:

Trigger #7343. Color code and description as in Fig. 4a.
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 \begin{figure}\resizebox{8.8cm}{!}{\includegraphics{12662f42.ps}}\end{figure} Figure 41:

Trigger #7343. Color code and description as in Fig. 4b.
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