Tolerance to sunlight (in minutes) for 13 patients prior to and after treatment with a sunscreen.
ex0430
A data frame with 13 observations on the following 2 variables.
Control
tolerance to sunlight (minutes) prior to sunscreen application
Sunscreen
tolerance to sunlight (minutes) after sunscreen application
Fusaro, R.M. and Johnson, J.A. (1974). Sunlight Protection for Erythropoietic Protoporphyria Patients, Journal of the American Medical Association 229(11): 1420.