Original sentence: BioMark/ACT and Trossel's Preventive Medicine Center were in a first wave of  companies and clinics offering untested stem cell therapy.These clinics made strong claims about their outcomes, but rarely published their protocols or rigorous research showing therapies were safe and effective
Edited sentence: BioMark/ACT and Trossel's Preventive Medicine Center were in a first wave of shady companies and clinics offering stem cell therapy to desperate people.These clinics made strong claims about their outcomes, but rarely published their protocols or rigorous research showing that their therapies were safe and effective