1. Day Surgery Units of Royal Adelaide Hospital, Adelaide, S.A.; Princess Alexandra Hospital, Brisbane, Qld; Princess Margaret Hospital, Christchurch, N.Z.; Woden Valley Hospital, Canberra, A.C.T.; Surgicentre, Dandenong, Vic; Warneford House Anaesthetic Unit, Hobart, Tasmania; Bentley Hospital, Perth, W.A.; and St George Hospital, Kogarah, N.S.W.