<qa>  What was the name of the study that was conducted prior to adalimumaThis was a multi-center, prospective, post-marketing observational study of participants with severe chronic plaque psoriasis who began adalimumab therapy in the United Kingdom. Although 153 participants enrolled in the study, data was only analyzed on 143 individuals and there were no interventions or changes to participant management for the study. Prior to initiating adalimumab therapy baseline, the Dermatology Life Quality Index DLQI, Self-Administered Psoriasis Area Severity Index SAPASI, Hospital Anxiety and Depression Scale HADS, Cutaneous Body Image CBI scale, Short Form 12 SF-12 Health Survey, Female Sexual Function Index FSFI female participants and International Index of Erectile Function IIEF male participants questionnaires were completed by participants and at 4 weeks, 16 weeks and 6 months following initiation. 