- Effect of foscarnet cream on experimental UV radiation-induced herpes labialis. Bernstein, D.I., Schleupner, C.J., Evans, T.G., Blumberg, D.A., Bryson, Y., Grafford, K., Broberg, P., Martin-Munley, S., Spruance, S.L. Antimicrob. Agents Chemother. (1997)