Original sentence: Those who criticize the use of thimerosal in vaccines have sought to establish evidence of harm from the substance through several scientific inquries, all of which have been criticized by public health agencies, medical organizations, and pharmaceutical companies:
Edited sentence: Those who criticize the use of thimerosal in vaccines have sought to establish evidence of harm from the substance through several scientific inquries, all of which have been criticized by public health agencies, medical organizations, and pharmaceutical companies, and ridiculed by self-proclaimed "quack busters":