Parenthetical phrase

"The ASPCA, taking a position not otherwise addressed either by other animal rights groups nor the rodeo industry , notes that practice sessions are often the location of more severe abuses than competitions.ASPCA "Animals in Entertainment: 5.4 Rodeo" web site accessed June 27, 2007." The above italicised phrase should be sourced. We don't know that every animal rights group nor the rodeo industry have not addressed this issue. The cited source does not indicate other animal groups and rodeo have not addressed the issue. The sentence could stand adequately written thus (and in agreement witht he cited source): "The ASPCA notes that practice sessions are often the location of more severe abuses than competitions."