References:
1.Ziegler D, Ametov A, Barinov A, et al. Oral Treatment With alpha-lipoic Acid Improves Symptomatic Diabetic Polyneuropathy: The SYDNEY 2 trial. Diabetes Care . 2006;29:2365-2370. http://care.diabetesjournals.org/content/29/11/2365.abstract
2.Ametov AS, Barinov A, Dyck PJ, et al. The sensory symptoms of diabetic polyneuropathy are improved with alpha-lipoic acid: the SYDNEY trial. Diabetes Care. 2003;26:770-776. http://www.ncbi.nlm.nih.gov/pubmed/12610036
3.Mijnhout GS, Kollen BJ, Alkhalaf A, Kleefstra N, Bilo HJ. Alpha lipoic Acid for symptomatic peripheral neuropathy in patients with diabetes: a meta-analysis of randomized controlled trials. Int J Endocrinol. 2012;2012:456279. http://www.ncbi.nlm.nih.gov/pubmed/22331979