CALR and peeling skin syndrome: Therefore, in addition to a seronegative subset, seropositive patients with pSS were classified into one of three serological subsets: anti-Ro alone (19 of 115 = 16%), anti-Ro+La(ppt−) (22 of 115 = 19%) and anti-Ro+La(ppt+) (55 of 115 = 46%).