RT Journal Article SR Electronic T1 What is the utility of measuring the serum ammonia level in patients with altered mental status? JF Cleveland Clinic Journal of Medicine JO Cleve Clin J Med FD Cleveland Clinic SP 252 OP 254 DO 10.3949/ccjm.76a.08072 VO 76 IS 4 A1 Elgouhari, Hesham M. A1 O’Shea, Robert YR 2009 UL http://www.ccjm.org/content/76/4/252.abstract AB