NEW : A researcher sued the company for ` ` fragile '' data . Roche says its research shows it is safe . They say the drug 's manufacturer buried it . Glaxo says documents on it are ` ` incomplete and misleading ''
NEW : A researcher blamed the company for `` fragile '' data . Glaxo says its research shows Avandia is safe . Senators say the drug 's manufacturer buried warnings . Glaxo says documents on problems are `` incomplete and misleading ''