No, there isn't, to my knowledge. My understanding of the decision to go to one year was not so much that it was.... It was based on science in general, in the sense that the five years was too long, but there was a parameter set that it shouldn't be less than a year. I do think there is evidence showing that it could be less than a year. Certainly for some people it could be much less. I know that trying to uncover some of that is an active area of research right now. I have colleagues in B.C. doing research on that.
On April 11th, 2019. See this statement in context.