Doctor of Medicine, U. Freiburg, Germany, 1975; Doctor medical habilitatus, U. Freiburg, Germany, 1986.
Intern, resident, clinical and research fellow department medicine University Freiburg, 1978—1985, staff member section pulmonary diseases, 1985—1987. Chief pulmonary and allergy section Ruhrlandklinik, Essen, Germany, since 1988. Associate professor medicine University Essen, 1988—1994, professor medicine, since 1994.
Visiting scientist Chest Disease Research Institute, Kyoto, 1992—1993. Visiting professor Beijing Institute Respiratory Medicine, China, since 2001. Chairman European BAL task group, since 1998.
Fellow American College Chest Physicians (international regent 2001-2006). Member German Society Pneumology, German Society Cytology, European Respiratory Society (science group chairman 1991-1993, 1999-2002, head clinical assembly 2002-2005, congress chair, 2006), American Thoracic Society (international advisor science program committee 1990-1995), World Association Sarcoidosis (executive committee since 1991, vice president 1995-2008, chairman World Congress Sarcoidosis 1997, president since 2008), Chilean Society Respiratory Diseases (honorary).
Married Josune Guzman y Rotaeche, September 2, 1982.