Gov. Mark Dayton has signed SB 2470, making Minnesota the 22nd state with a compassionate medical marijuana law. While the new law contains unnecessary restrictions, it will bring needed relief to some very deserving patients and their families. Passage of this law was never certain, and, at times, political pundits dismissed the idea that the legislature could agree to any kind of program; but patients, families, and advocates prevailed. While lawmakers had the pleasure of actually casting the votes,…