Affiliation: | 1. Dartmouth College, Department of Biological Sciences, New Hampshire, U.S.A.;2. N.H. Division of Public Health, Bureau of Special Medical Services, New Hampshire, U.S.A.;3. Dartmouth College, Department of Biological Sciences, New Hampshire, U.S.A. N.H. Division of Public Health, Bureau of Special Medical Services, New Hampshire, U.S.A.;4. Dartmouth-Hitchcock Medical Center, Department of Pathology, New Hampshire, U.S.A. |