SLCO1B1 and pemphigus foliaceus: As for the variant in SLCO1B1 gene, association of variant allele and lower risk for developing kidney insufficiency and high RVSP was observed in group of patients being treated with MTX (OR = 0.76 [0.59–0.96], p = 0.03 and OR = 0.74 [0.56–0.97], p = 0.04 respectively) and with developing PF in patients treated with AZA (OR = 0.64 [0.43–0.95], p = 0.04).