TORONTO -- A doctor who led an expert report on autism that the Ontario government is using to justify a controversial treatment funding decision is speaking out, albeit cautiously.

Ian Dawe was the chair of an expert committee that made several recommendations to the government, including that early Intensive Behavioural Intervention be provided to kids between the ages of two and four.

The government has decided, as part of a new Ontario Autism Program, to defund IBI for kids five and over, instead transitioning them to "enhanced Applied Behavioural Analysis" treatment.

But parents whose children had waited for years on the IBI wait list, only to be removed after the new program was announced, are protesting the changes.

They point to tweets by Dawe -- who is no longer the chair of the committee -- saying there is "no evidence" a woman's six-year-old son with autism "might not benefit" from IBI as proof the expert advice contradicts the government's decision.

But Dawe says in an email to The Canadian Press that he stands behind the report, and that the committee "had no mandate to advise government on funding decisions, the specifics of which were and are the government's sole discretion."

The report speaks to 10 recommendations, Dawe said, and the current debate is about "the execution of half of one recommendation."

"My Twitter comments were an empathic personal response to an individual who reached out to me and should only be interpreted as such," Dawe wrote.

"I stand firmly behind the recommendations made in the report by Ontario's Clinical Expert Committee on Autism, which laid out a comprehensive strategy for what a system for autism care should look like...I believe the substance of my message last week is not at all inconsistent with what I wrote."