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Günther I, Psylla M, Reddy GN, Antonini A, Vontobel P, Reist HW, Zollinger A, Nickles RJ, Beer HF, Schubiger PA, et al.Günther I, et al. Among authors: beer hf.Nucl Med Biol. 1995 Oct;22(7):921-7. doi: 10.1016/0969-8051(95)00032-s.Nucl Med Biol. 1995.PMID: 8547890
Hajek M, Wieser HG, Khan N, Antonini A, Schrott PR, Maguire P, Beer HF, Leenders KL.Hajek M, et al. Among authors: beer hf.Neurology. 1994 Nov;44(11):2125-32. doi: 10.1212/wnl.44.11.2125.Neurology. 1994.PMID: 7969971
Beer HF, Lin S, Novak-Hofer I, Bläuenstein P, Schubiger PA.Beer HF, et al.Int J Rad Appl Instrum A. 1992 Jun;43(6):781-7. doi: 10.1016/0883-2889(92)90242-7.Int J Rad Appl Instrum A. 1992.PMID: 1319421