MacPherson H, Tilbrook H, Richmond S, Woodman J, Ballard K, Atkin K, Bland M, Eldred J, Essex H, Hewitt C, Hopton A, Keding A, Lansdown H, Parrott S, Torgerson D, Wenham A, Watt I. Alexander Technique Lessons or Acupuncture Sessions for Persons With Chronic Neck Pain: A Randomized Trial. Annals of Internal Medicine 2015; 163: 653-62.