0 hrs, ANOVA *P* \< 0.0000, Dunnett's test: 000 and 00 μM *P* \< 0.00; F). Data are shown as the median, the 00th and 00th percentiles and the range. \**P* \< 0.00 and \*\**P* \< 0.00 for control *versus* forskolin