Conversational Agents Supporting Self-Management in People With a Chronic Disease: Systematic Review - Tessa F Peerbolte; Rozanne JA van Diggelen; Pieter van den Haak; Kim Geurts; Luc JW Evers; Bastiaan R Bloem; Nienke M de Vries; Sanne W van den Berg (Journal of Medical Internet Research)