Handheld computers for survey and trial data collection in resource-poor settings: Development and evaluation of PDACT, a PalmTM Pilot interviewing system. - Christopher J. Seebregts; Merrick Zwarenstein; Catherine Mathews; Lara Fairall; Alan J. Flisher; Clive Seebregts; Wanjiru Mukoma; Knut-Inge Klepp (Int. J. Medical Informatics, 2009)