Phototherapy/Jaundice causing lactose intolerance

My nephew was born with Jaundice and gone through intense phototherapy. He has lactose intolerance after that. So is that a rare cause? Currently he is 10 months old.

Heres the links:

http://www.curehunter.com/public/pubmed7368913.do
http://www.ncbi.nlm.nih.gov/pubmed/2732639
http://www3.interscience.wiley.com/journal/119592117/abstract?CRETRY=1&SRETRY=0
http://www.drugs.com/cg/phototherapy-for-jaundice-in-newborns-inpatient-care.html
http://www.pedresearch.org/pt/re/pedresearch/fulltext.00006450-200112000-00012.htm;jsessionid=KHvL7K8nLLlZVn2Wb18Qyp8vDYyq2vwsnK2ByBsTVYfRLyc2mnB0!-634287438!181195629!8091!-1