| Telephone | 314-362-8830 (office) 314-362-8829 (lab) |
| Fax | 314-362-8826 |
| dtollefs@dom.wustl.edu | |
| Office location | Room 8868 Clinical Sciences Research Building |
| Lab location | Rooms 8867/8868 Clinical Sciences Research Building |
| Postal address (US mail) | Hematology Division Campus Box 8125 Washington University Medical School 660 South Euclid Avenue St. Louis, MO 63110 |
| Shipping address (packages) | Clinical Sciences Research Building Room 8868 4940 Parkview Place St. Louis, MO 63110 |
| Street address | Clinical Sciences Research Building 4939 Children's Place St. Louis, MO 63110 |