1. University of Tennesse Health Science Center, Memphis, Tennessee, USA, Tel.: 901 448 6044; Fax: 901 867 0749;
2. Women's Health Institute, University Medical and Dental School of New Jersey (UMDNJ), Robert Wood Johnson Medical Centre, New Brunswick, New Jersey, USA, Tel.: 732 235 7633; Fax: 732 235 8302;