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Volume 66, no. 6, p. 2660–2665, 1998. Page 2663, Table 1, boxhead above columns 2 and 3: “SEM” should read “SD.”
Legend to Fig. 3, line 4: “before exposure to CdB or CD for 18 h” should read “before exposure to CdB for 18 h.”
Page 2664, Fig. 4, bars in panel a: “■ confluent; ▨ subconfluent” should read “▨ confluent; ■ subconfluent.”
