Bolometric correction as a function of Log(L_bol). WISSH BAL and non-BAL QSOs are shown as indigo and purple stars, respectively. The XMM-COSMOS sample of 343 Type 1 AGN presented by L10 is represented by yellow dots; it covers a wide range of redshifts (0.04 < z < 4.25) and X-ray luminosities (40.6 ≤ Log(L_2 − 10/erg s⁻¹)≤45.3). The 22 SUBWAYS QSOs and Type 1 AGN at intermediate redshifts (0.1 ≲ z ≲ 0.4) from Matzeu et al. (2023) can be seen as red dots. Light blue triangles correspond to the 14 radio-quiet high-λ_Edd (λ_Edd ≳ 1) QSOs at 0.4 ≤ z ≤ 0.75 presented by Laurenti et al. (2022). The sample of luminous and intrinsically blue QSOs at z ≈ 3 presented by Trefoloni et al. (2023), for which constrained L_2 − 10, Γ, λ_Edd, and CIV line velocity values are available, are shown as pink squares. The black solid and dashed lines correspond to D20 best fit to Type 1 sources and its 0.26 dex spread, respectively.