RT Journal Article SR Electronic T1 Chinese herbal medicines, aristolochic acid and Balkan endemic nephropathy JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 237 OP 237 DO 10.1136/oem.2010.061663 VO 68 IS 4 A1 J I Pitt YR 2011 UL http://oem.bmj.com/content/68/4/237.abstract AB