From the National Public Health Institute, Drug Research Unit, Helsinki, Finland.
Received for publication September 13, 2007; accepted December 6, 2007.
Address for correspondence: Pirjo Lillsunde, National Public Health Institute, Drug Research Unit, Mannerheimintie 166, 00300 Helsinki, Finland (e-mail: [email protected]).
doi: 10.1097/FTD.0b013e3181685088