1. Manassis K. Recurrent pain in children with anxiety disorders. Suffer Child. 2004;2:61–5.
2. Campo JV, Bridge J, Ehman J, Altman S, Lucas A, Birmaher B. Recurrent abdominal pain, anxiety and depression in primary care. Pediatrics. 2004;113:817–24.
3. Lo Curto M, Casuccio A, Manzo V, et al. Pain in paediatric hospital units. Ital J Pediatr. 2007;33:273–80.
4. Lo Curto M, Maggio MC, Campisi F, Manzo V, Costa A, Montalbano G, et al. Functional pain in hospitalised and school children. Minerva Pediatr. 2012;64(5):493–500.
5. Diepenmaat ACM, Van der Wal MF, de Vet HCV, Hirasing R. Neck/shoulder, low back, and arm pain in relation to computer use, physical activity, stress, and depression among dutch adolescents. Pediatrics. 2006;117:412–41.