RT: @NEJM Does this patient have mercury toxicity? Click to take this week's Image Challenge. http://t.co/mZCGG98zYf http://t.co/IVnxjLSrpG

RT: @NEJM Does this patient have mercury toxicity? Click to take this week's Image Challenge. http://t.co/mZCGG98zYf http://t.co/IVnxjLSrpG (via Twitter http://ift.tt/1ECNnR5)