{"first_sentence": {"type": "/type/text", "value": "In his now classic writings on the origin of cancer, Sir Richard Doll' proposed three potential causative factors underlying tumor development: (1) environmental factors, particularly diet, industrial pollution, and viruses; (2) systemic factors, including breakdowns in immunosurveillance; and (3) genetic factors, such as the degree of susceptibility to cancer."}, "physical_format": "Hardcover", "subtitle": "Principles and Practice (Jones and Bartlett Series in Nursing)", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "weight": "9.6 pounds", "languages": [{"key": "/l/eng"}], "type": {"key": "/type/edition"}, "publishers": ["Jones & Bartlett Pub"], "number_of_pages": 1724, "isbn_13": ["9780867206401"], "id": 11276444, "edition_name": "3 Sub edition", "isbn_10": ["0867206403"], "publish_date": "April 1993", "key": "/b/OL8330822M", "authors": [{"key": "/a/OL2932551A"}], "title": "Cancer Nursing", "contributions": ["Margaret Hansen Frogge (Editor)"], "subjects": ["Oncology", "Nursing", "Cancer Care Nursing", "Medical / Nursing", "Medical", "Nursing - Oncology & Cancer", "Cancer", "Neoplasms"], "physical_dimensions": "11.2 x 9.2 x 3.2 inches", "revision": 1}