Fehniger, Thomas E Direct demonstration of tissue uptake of an inhaled drug: proof-of-principle study using matrix-assisted laser desorption ionization mass spectrometry imaging. [electronic resource] - Analytical chemistry Nov 2011 - 8329-36 p. digital Publication Type: Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 1520-6882 Standard No.: 10.1021/ac2014349 doi Subjects--Topical Terms: Administration, InhalationAdultAirway Obstruction--drug therapyBiopsyBronchi--cytologyBronchodilator Agents--administration & dosageBronchoscopyHumansIpratropium--administration & dosageMolecular Imaging--methodsSpectrometry, Mass, Matrix-Assisted Laser Desorption-IonizationTissue Distribution