RT Journal Article SR Electronic T1 Methemoglobinemia: Sudden Dyspnea and Oxyhemoglobin Desaturation After Esophagoduodenoscopy JF Respiratory Care FD American Association for Respiratory Care SP 940 OP 942 VO 49 IS 8 A1 Lunenfeld, Ellen A1 Kane, Gregory C YR 2004 UL http://rc.rcjournal.com/content/49/8/940.abstract AB