[1] Monklands Hosp, Dept Dermatol, Airdrie, Lanark, Scotland
[2] Crosshouse Hosp, Dept Haematol, Kilmarnock, Ayr, Scotland
[3] Monklands Hosp, Dept Haematol, Airdrie, Lanark, Scotland
[4] Royal Alexandra Hosp, Dept Dermatol, Paisley, Renfrew, Scotland
[5] Univ Glasgow, Dept Med, ATMU, Glasgow, Lanark, Scotland