The relationship between metabolite from 1H-MRS and brain volume by magnetic resonance technique in methamphetamine users oleh Nuttawadee Intachai, Artit Rodkong, Napapon Sailasuta, Apinun Aramrattana, Kanok Uttawichai, Mekkla Thompson, Bangorn Sirirojn, Daralak Thavornprasit, Sineenart Taejaroenkul, Kamolrawee sintupat, Victor Valcour, Robert Paul, Suwit Saekho