Two papers, authored by the same group of researchers, explored the effect of RFR exposure on the skin (Manchez 2006, Sanchez 2006). Skinless rats were exposed to either 900 or 1800 MHz RFR, either for 2 hours at SAR of 5 W/kg, or for 2 hours per day, 5 days a week, for 12 weeks at 900 or 1800 MHz at SAR of 2.5 or 5 W/kg. There were no significant changes in the skin of exposed rats, when compared with skin from an unexposed part of the same area of the rat, or with control or sham-exposed rats.

References:

Authors
Jia F, Ushiyama A, Masuda H, Lawlor GF, et al.:
Title
Role of blood flow on RF exposure induced skin temperature elevations in rabbit ears. Journal
Bioelectromagnetics 2007;28:163-172.
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Authors
Masuda H, Sanchez S, Dulou PE, Haro E, et al.
Title
Effect of GSM-900 and -1800 signals on the skin of hairless rats: 1: 2-hour acute exposures.
Journal
Int J Radiat Biol 2006;82:669-674.
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Authors
Sanchez S, Masuda H, Billaudel B, Haro E, et al.
Title
Effect of GSM-900 and -800 signals on the skin of hairless rats: 11: 12-week chronic exposures.
Journal
Int J Radiat Biol 2006;82:675-680
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