Single cell gel/comet assay: guidelines for in vitro and in vivo genetic toxicology testing - Tice, R R; Agurell, E; Anderson, D; Burlinson, B; Hartmann, A; Kobayashi, H; Miyamae, Y; Rojas, E; Ryu, J C; Sasaki, Y F (Environ Mol Mutagen, 2000)