Robinson, J K Relative importance of prior basal cell carcinomas, continuing sun exposure, and circulating T lymphocytes on the development of basal cell carcinoma. [electronic resource] - The Journal of investigative dermatology Aug 1992 - 227-31 p. digital Publication Type: Clinical Trial; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't ISSN: 0022-202X Standard No.: 10.1111/1523-1747.ep12650450 doi Subjects--Topical Terms: AgedCD4-CD8 RatioCarcinoma, Basal Cell--bloodCell CountEnvironmental ExposureHumansIsotretinoin--pharmacologyKiller Cells, Natural--cytologyLymphocytes, Tumor-Infiltrating--cytologyMiddle AgedNeoplasm Recurrence, LocalSkin Neoplasms--bloodSunlight--adverse effectsT-Lymphocytes, Helper-InducerT-Lymphocytes, RegulatoryTime Factors