1. Tough SC, Greene CA, Svenson LW, Belik J. Effects of in vitro fertilization on low birth weight, preterm delivery, and multiple birth. J Pediatr. 2000;136:618–22.
2. Korean Society of Pediatric Rehabilitation and Developmental Medicine. Clinical features and treatment of cerebral palsy in: Sung IY, Shin YB, Park SS, editors. Pediatric Rehabilitation Medicine. 2nd ed. Seoul: Gunja Publishing House; 2013. p. 381–92. ISBN 8962786494.
3. Lee YG, Chae JW. A patient with lower limbs’ delayed motor development was demonstrated hang-ji: a case report. J Pediatr Korean Med. 2007;21:215–21.
4. Jung W-K, Han D-Y, Han DY, Kim D-R. An evaluation of significance of oriental medicine on treating speech impediment and limb impediment among the children with development disabilities. J Sasang Const Med. 2005;17:120–9.
5. Yu S. Two cases of patients with developmental disorder treated by herbal medicine alone. J Pediatr Korean Med. 2011;25:39–54.