1. Department of Health Care Management, Faculty of Economics and Administrative Sciences, Hacettepe University, Ankara, Turkey
2. Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Ankara, Turkey
3. Department of Health Management, Niğde Zübeyde Hanım School of Health, Niğde Ömer Halisdemir University, Niğde, Turkey
4. Department of Health Care Management, Faculty of Health Sciences, Kırıkkale University, Kırıkkale, Turkey
5. Department of Endocrinology and Metabolism, Faculty of Medicine, Ankara University, Ankara, Turkey
6. Taşköprü State Hospital, Kastamonu, Turkey
7. Present address: Cincinnati Children Hospital, Cincinnati, Ohio, USA.