1. Finsen L, Christensen H, Bakke M . Musculoskeletal disorders among dentists and variation in dental work. Appl Ergon 1998; 29: 119–125.
2. Milerad E, Ekenvall L . Symptoms of the neck and upper extremities in dentists. Scand J Work Environ Health 1990; 16: 129–134.
3. Osborn J, Newell K, Rudney J, Stoltenberg J . Musculoskeletal pain among Minnesota dental hygienists. J Dent Hyg 1990; 64: 132–138.
4. Rundcrantz B-L, Johnsson B, Moritz U . Cervical pain and discomfort among dentists. Epidemiological, clinical and therapeutic aspects. Part 1. A survey of pain and discomfort. Swed Dent J 1990; 14: 71–80.
5. Oberg T, Oberg U . Musculoskeletal complaints in dental hygiene: a survey study from a Swedish country. J Dent Hyg 1993; 67: 257–261.