SAN JOSE, Calif. — In the tight-knit world of academic medicine, scientists pride themselves on presenting a united and unflappable face to those outside their ranks.But this week, in a scathing letter, dozens of Stanford University Medical School’s top faculty took aim at their former colleague Dr. Scott Atlas for promoting what they called “falsehoods and misrepresentations of science.”Atlas, a diagnostic radiologist and senior fellow at the conservative think tank Hoover Institution, was recently appointed by President Donald Trump to the White House coronavirus task force.As an adviser cou…