Evercore ISI analyst Umer Raffat says the Valeant documents released ahead of Thursday's Congressional hearing on drug pricing contain a potential discrepancy between CEO Mike Pearson's comments on a conference call and an internal email sent by then CFO Howard Schiller. On the company's Q1 earnings call last year, Pearson told investors and analysts that volume was greater than price in terms of the company's growth in the quarter, Raffat points out to investors in an intraday research note. In contrast, then-CFO Howard Schiller sent an email to Pearson a few weeks after the earnings call stating that excluding the Marathon deal, price represented about 60% of Valeant's quarterly growth. On the surface, this means that either the CEO was inaccurate on the Q1 call, or the CFO's email was inaccurate, Raffat writes. It could also mean neither had done the math properly, the analyst adds. Either way, Raffat thinks Thursday's hearing isn't too critical for shares of Valeant. He has a Buy rating on the stock with a $200 price target. Valeant is down 5%, or $4.61, to $91.04 in midday trading.