== Methamphetamine == 

 In the causes/substance abuse section, I recently added a study about methamphetamine (crank, tweak, speed, crystal meth) being a possible cause of schizophrenia, only to have it repeatedly reverted.  I understand that we should use secondary sources instead of primary ones whenever possible, and that news reports of primary studies apparently don't count as WP:MEDRS.  However, while that study appeared to be the first of its kind in the Western world, the original study cites older Japanese studies that suggest similar conclusions.  Thus, it can function as both a primary and a secondary source as long as those Japanese studies are also mentioned.