1. Abu-Saad HH, Kroonen E, Halfens R (1990) On the development of a multidimensional Dutch pain assessment tool for children. Pain 43: 249–256
2. Ambuel B, Hamlett KW, Marx C, Blumer JL (1992) Assessing distress in the pediatric intensive care environments: The COMFORT Scale. J Pediatr Psychol 17:95–109
3. Anand KJS (1993) The applied physiology of pain. In: Anand KJS, McGrath PJ (Hrsg) Pain in neonates. Elsevier, Amsterdam, S 39–66
4. Barr R (1992) Is this infant in pain? Caveats from the clinical setting. Am Pain Soc J 1: 187–190
5. Barrier G, Attia J, Mayer MN, Amiel-Tison CL, Shnider SM (1989) Measurement of postoperative pain and narcotic administration in infants using a new clinical scoring system. Int Care Med 15:37–39