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Schweizerische Medizinische Wochenschrift|September 8, 1990
[Treatment of achalasia using balloon dilatation]R Baumann, R de Peyer, J P Dederding, et al.Schweizerische Medizinische Wochenschrift|June 2, 1990
[Questionable usefulness of the edrophonium test in the diagnosis of non-cardiac retrosternal pain]G Apollonio, J P Dederding, R Bosson, et al.Pageof 1