Sign up today for the new CNBC Sport Newsletter The National Basketball Association told its 30 teams on Monday that it was instituting a broad review of betting-related issues to "protect the integrity of the NBA and our affiliated leagues" in the wake of a bombshell federal indictment that alleges confidential information about players was leaked to gamblers . In particular, the review will focus on proposition bets offered by legal online sports bookies, which allow gamblers to wager on the