O'Nan, W W Sodium pertechnetate Tc 99m in lacrimal secretion. [electronic resource] - Archives of ophthalmology (Chicago, Ill. : 1960) Mar 1974 - 187-9 p. digital Publication Type: Journal Article ISSN: 0003-9950 Standard No.: 10.1001/archopht.1974.03900060195007 doi Subjects--Topical Terms: HumansInjections, IntravenousMethodsSecretory RateTears--analysisTechnetium--administration & dosageTime Factors