1. Division of Internal Medicine/Endocrinology, Texas Tech University Health Science Center, Lubbock, Texas
2. Division of Hematology, Texas Tech University Health Science Center, Lubbock, Texas
3. Division of Endocrinology, Truman Medical Center–UMKC Health Sciences, Kansas City, Missouri
4. Division of Pulmonary and Critical Care, Texas Tech University Health Science Center, Lubbock, Texas