New approaches to evaluation: Alternatives to the randomized controlled trial – qualitative approaches to design and evaluation: Theory and practice - Kaplan, B; Aarts, J; Hebert, M; Klecun-Dabrowska, E; Lewis, D; Vimlarlund, V; Patel, V; Rogers, R; Haux, R (Medinfo 2001, 2001)
(eds)