Methods HEL cells were incubated with chrysotile which was pretreated by soaking in aluminium citrate,mixed rare earths or sodium selenite solutions at different concentrations for 1 hour.

• 方法用不同浓度的柠檬酸铝、混合稀土或亚硒酸钠溶液浸泡温石棉1小时后，再将其与HEL细胞共同孵育，通过3H－TdR掺入法，测定了HEL细胞的UDS。