أرسل هذا في رسالة قصيرة: Cross validation of gas chromatography-flame photometric detection and gas chromatography-mass spectrometry methods for measuring dialkylphosphate metabolites of organophosphate pesticides in human urine

 ______     _____    __   _     ______    ______  
|      \\  |  ___|| | || | ||  /_   _//  /_   _// 
|  --  //  | ||__   | '--' ||   -| ||-   `-| |,-  
|  --  \\  | ||__   | .--. ||   _| ||_     | ||   
|______//  |_____|| |_|| |_||  /_____//    |_||   
`------`   `-----`  `-`  `-`   `-----`     `-`'