title: Practice when minimal phototoxic and minimal erythema doses are not determinable.
authors.affiliation: Department of Dermatology, Ninewells Hospital and Medical School, Dundee, UK.
authors.forename: Louise
authors.initials: L
authors.lastname: Macfarlane
authors.affiliation: Department of Dermatology, Ninewells Hospital and Medical School, Dundee, UK.
authors.forename: Bevin
authors.initials: B
authors.lastname: Bhoyrul
authors.affiliation: Photobiology Unit, Department of Dermatology, Ninewells Hospital and Medical School, Dundee, UK.
authors.forename: Sally H
authors.initials: SH
authors.lastname: Ibbotson
authors.affiliation: Photobiology Unit, Department of Dermatology, Ninewells Hospital and Medical School, Dundee, UK.
authors.forename: Robert S
authors.initials: RS
authors.lastname: Dawe
mesh_terms: D004890:Erythema / Q000209:etiology* / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008297:Male; D011701:PUVA Therapy / Q000009:adverse effects* / Q000379:methods; D011565:Psoriasis / Q000188:drug therapy*; D012189:Retrospective Studies