A review of several scientific studies of AK-specific procedures and diagnostic tests concluded: "When AK is disentangled from standard orthopedic muscle testing, the few studies evaluating unique AK procedures either refute or cannot support the validity of AK procedures as diagnostic tests. The evidence to date does not support the use of manual muscle testing for the diagnosis of organic disease or pre/subclinical conditions." Another concluded that "There is little or no scientific rationale for these methods. Results are not reproducible when subject to rigorous testing and do not correlate with clinical evidence of allergy." A double-blind study was conducted by the ALTA Foundation for Sports Medicine Research in Santa Monica, California, and published in the June 1988 Journal of the American Dietetic Association. The study used three experienced AK practitioners and concluded that, "The results of this study indicated that the use of applied kinesiology to evaluate nutrient status is no more useful than random guessing."