Tweetations for "Patients’ Participation in Health Research: A Classification of Cooperation Schemes" Olivier Las Vergnas J Participat Med 2017 (Oct 12); 9(1):e16 All Time (6) In the last month (0) In the last six months (0) In the last year (6) Tweets 1 - 6 of 6. 2017-10-12 16:56:33 2017-10-12 17:02:35 2017-10-12 17:02:50 2017-10-13 04:45:00 2017-10-13 04:49:28 2017-10-17 08:50:50 Tweets 1 - 6 of 6. 1