The influence of social networking sites on health behavior change: a systematic review and meta-analysis. - Liliana Laranjo; Amaël Arguel; Ana Luísa Neves; Aideen M. Gallagher; Ruth Kaplan; Nathan J. Mortimer; Guilherme A. Mendes; Annie Y. S. Lau (J. Am. Medical Informatics Assoc., 2015)