A Mumbai-based chain opened two clinics in Delhi on Thursday promising to provide effective diagnosis and treatment -- without needless surgery -- for spinal problems. 'Qi Spine Clinic' which till now had a presence only in Mumbai began its Delhi operations by opening a clinic each in Greater Kailash-1 in south Delhi and Punjabi Bagh in west Delhi. (Read: Yoga asanas for the spine) 'The treatment for back pain usually starts with MRIs and X-ray tests which only detect (troubled spots in) the bones that carry 30 percent of the body's weight and not the muscles on which the other