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A simple nonsurgical technique of obtaining fat samples by aspiration from the gluteal prominence was developed by Hirsh in 1960 and has been in use in our Nutrition Clinic at the Mount Sinai Hospital for several years. We have modified it for field use and the analysis of fat-soluble hydrocarbon residues. All the materials which will contain the fat sample to be analyzed are washed with acetone and pesticide residuefree hexane, and a 15 gauge needle and 33 cc syringe are sterilized. Aspirationdoi:10.2307/3428759 fatcat:qazj3yebybdbfeg6bdemnba3mu