I have re-written the unsubstantiated line and eliminated one that followed.  The eliminated line further addressed the mis-conception that Margulis' article argued that AIDS is not caused by HIV.  The line noted that this argument would be unsubstantiated by the success of anti-retroviral drugs.  The Margulis et al. paper addresses anti-retroviral drugs in such a way that the drugs' efficacy is not prima face evidence nullifying the suppositions of the paper.