excluded very young infants in whom febrile illnesses are considered more serious. The subjects were randomly assigned to receive either (1) acetaminophen alone or (2) acetaminophen plus a tepid sponge bath. Randomization was achieved by assigning subjects to the treatment group specified by opening in order the next of 20 sealed, serially numbered envelopes containing previously shuffled cards.
The treatment to be received was written were 10 cards for each treatment group.