Rheumatic Musculoskeletal Disease Unit, Our Lady's Hospice an Dublin d Care Services, Harold's Cross, Ireland. kemurray@hotmail.com. Rheumatology Department, University College Dublin and St. Vincent's University Hospital, Elm Park, Dublin 4, Ireland. kemurray@hotmail.com. Rheumatic Musculoskeletal Disease Unit, Our Lady's Hospice an Dublin d Care Services, Harold's Cross, Ireland. UCD Perinatal Research Centre, Obstetrics and Gynaecology, School of Medicine, University College Dublin, National Maternity Hospital, Dublin, Ireland. Rheumatology Department, University College Dublin and St. Vincent's University Hospital, Elm Park, Dublin 4, Ireland.