* Some scientists have doubled the number of new product applications to be reviewed. * Some deadlines for tobacco products will not be met and the start of new applications has been delayed, according to a scientist. * FDA staff has been asked to put other tasks on hold, including providing early feedback on planned product applications. (Added information on FDA layoffs in paragraph 2, Philip Morris' comment in paragraph 8, lawyer's comment in paragraphs 13 and 14) March 27 (Reuters) - Some U.S. health regulators that review medical devices and tobacco products for safety and efficacy are struggling to meet congressional deadlines due to the Trump administration's layoffs, three scientist... [Read more]