RT @NEJM: China has undertaken remarkable health system experiments that are instructive at many levels. New in our series: http://t.co/zZmSNNbNcU

RT @NEJM: China has undertaken remarkable health system experiments that are instructive at many levels. New in our series: http://t.co/zZmSNNbNcU (via Twitter http://ift.tt/1Dzw170)