The American Journal of Medicine. 2015;128(4):389-95 http://www.amjmed.com/article/S0002-9343(14)01086-9/abstract?elsca1=etoc&elsca2=email&elsca3=0002-9343_201504_128_4_&elsca4=
The American Journal of Medicine. 2015;128(4):410-7 http://www.amjmed.com/article/S0002-9343(14)01090-0/abstract?elsca1=etoc&elsca2=email&elsca3=0002-9343_201504_128_4_&elsca4=