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Helvetica Paediatrica Acta|May 1, 1984
[Prevalence of allergies in children and adolescents]H S Varonier, J de Haller, C SchopferSchweizerische Medizinische Wochenschrift|January 22, 1983
[Non-tuberculous Mycobacteria: epidemiologic importance and current pathogenicity]R De Haller, J D Piguet, J De HallerPageof 1