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Despite dramatic price differences, quality materials and techniques remain identical in reputable clinics

Other drugs: Clonidine earlier used to treat high blood pressure, now also used to help quit smoking Naltrexone - a drug used to cure disorders associated with alcohol and opioid abuse

Even then, a far more heavily funded NCI research project in the 1980s was chemoprevention, which aimed to reduce lung cancer in smokers with large doses of vitamin A

Ethics declarations Ethics approval and consent to participate Our study adheres to the Declaration of Helsinki guidelines for research involving human subjects