Department of Psychiatry and Behavioural Sciences, Duke University Medical Center, Durham, NC, USA
Correspondence to Indu Varia, Duke University Medical Center, 2213 Elba Street, 246 Civitan Building, Durham, NC 27710, USA
Tel: +1 919 684 0115; fax: +1 919 681 8627; e-mail: [email protected]
Received 27 September 2001 accepted 19 February 2002