Let parents choose the type of therapy they feel would be most effective for their child and their situation. You do not tell a cancer patient what procedures they must have and ban others. You do not tell families what they must do for their elderly parents; you let them choose from a myriad of options based upon their condition and situation. Parents with children who are suffering a serious medical condition need to be able to study all options and make informed decisions without interference from the government.
It would be wrong to take an option off the table so that parents to cannot even consider it among the other options. LET PARENTS CHOOSE WHAT THEY FEEL IS BEST FOR THEIR LOVED ONE.