Complex sentence: Some acupuncturists have argued that dry needling appears to be an acupuncture technique requiring minimal training that has been re-branded under a new name ("dry needling"), but many physical therapists and chiropractors have asserted that they are not practising acupuncture when dry needling.
Split into simpler sentences: Some acupuncturists have argued that dry needling appears to be an acupuncture technique requiring minimal training that has been re-branded under a new name ("dry needling"). Many physical therapists and chiropractors have asserted that they are not practising acupuncture when dry needling.