Lars Friberg

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{{#badges: tobaccowiki}} Lars Friberg, Ph.D. was a Professor at Karolinska Institutet in Sweden. He has served as a witness for defendant tobacco companies in tobacco legal cases. He worked with Rune Cederlof, who performed studies on twins where one twin smoked and one did not. Cederlof concluded that smoking was caused by genetic or environmental factors.


Dr. Lars Friberg was a scientist for the Council for Tobacco Research (CTR). He worked in conjunction with the tobacco industry's litigation efforts, while simultaneously being touted as being an independent CTR-sponsored scientist. He was sponsored by both the Council for Tobacco Research and the special projects division (Judge H.L. Sarokin, Haines opinion 2/6/92; Haines P. Ex. D-E).

Dr Lars Friberg visited Australia in December 1969 in a trip organized and sponsored by Philip Morris.

Friberg, working with colleague Rune Cederlof, also produced some research that was unfavorable to the industry. A 1984 letter from Brown & Williamson's law department recommends changes and deletions that should be made to a British American Tobacco draft paper on smoking and health. It states,

Recommend delete references to Friberg and the Bibliography on Smoking and Health. Unfortunately, Friberg, Cederlof and Lundman published a monograph in 1977 which stated that

"lung cancer is closely related to the amount smoked..." that associations were confirmed between smoking and respiratory, cardiovascular and other symptoms of disease or ill health, that there is no doubt about a causal link between smoking and lung cancer, anc that the results from the Swedish monozygotic twin studies are contrary to the constitutional hypothesis advanced by Fisher. The problem carries over into the quote from the Bibliography on Smoking and Health, which should also be deleted. The same article states that "the well documented evidence of a causal association between smoking and lung cancer found in other studies has been further #21

Papers authored by Friberg

Cederlof, R., Friberg, L., Jonsson, E., Kaij, L. Morbidity among monozygotic twins. Arch Environ Health 10(2): 346-350; 1965.

Cederlof, R., Friberg, L., Jonsson, E., Kaij, L. Respiratory symptoms and `angina pectoris" in twins with reference to smoking habits. An epidemiological study with mailed questionnaire. Arch. of Environ. Health 13(6):726-737; 1966.

Cederlof, R. et al., Hereditary factors and "angina pectoris" Arch Environ Health 14 (3): 397-400; 1967.

Cederlof, R., et al. Hereditary factors, "spontaneous cough" and smoker' s cough. Arch Environ Health 14(3): 401-406; March 1967.

Cederlof, R., Friberg, L. Tobacco smoking and health: Results of epidemiologic studies in twins. Source? 65(27): 2727-2734; July 3, 1968.

Cederlof, R., Friberg, L., Hrubec, Z. Cardiovascular and respiratory symptoms in relation to tobacco smoking. A study on American twins. Arch. Environ. Health 18(June):934-940, 1969.

Friberg L, Cederlof R, Lorich U, LundmanT, De Faire U. Mortality in twins in relation to smoking habits and alcohol problems. Arch Environ Health 1973;27:294-304.

Cederlof, R., Friberg, L., Hrubec, Z., Lorich, U. The Relationship of Smoking and Some Social Covariables to Mortality and Cancer Morbidity. A Ten Year Follow-up in a Probability Sample of 55,000 Swedish Subjects Age 18-69, Part 1/2. Stockholm, Sweden: Karolinska Institute, Department of Environmental Hygiene, 1975.

Cederlof, R., Friberg, L. and Lundman, T. (1977). The interactions of smoking, environment and heredity and their implications for disease etiology : a report of epidemiological studies on the Swedish twin registries. Acta Med. Scand. Suppl. 612, 1-128.

Cederlof, R., et al., Air Pollution and Cancer: Risk Assessment Methodology and Epidemiologic Evidence, Env. Health Persp. 22:1-12, 1978.

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