Despite Narconon's claim that it is "The World's Most Successful Drug Rehab", it has a surprisingly small circle of supporters. Its supporters generally fall into three distinct categories: individual, corporate/governmental, and scientific/medical. When one looks closely at the groups and individuals supporting L. Ron Hubbard's drug rehabilitation and "purification" methods, one invariably finds the same names cropping up repeatedly, often citing each other to support their arguments. What is more, many of those involved have links to Scientology and Narconon which are often not disclosed, thus giving a misleading appearance of independence. The issues are discussed on the following pages.