GSTM1 and pemphigus foliaceus: The results of blood tests on admission showed that 47/319 (20.1%) patients were found to have Hb levels below 70 g/L, 40/230 (21.3%) of whom were in the HE‐PF group and 7/89 (16.9%) of whom were in the LE‐PF group (P = 0.031).