dr. nora volkow with the national institutes of health. dr. douglas throckmorton, the food and drug administration. dr. deborah houry, for injury and prevention for the centers for disease control and prevention. dr. hyde. and dr. conway from medicare and medicaid services. welcome. the committee has a practice of taking testimony under oath. do you have any objection to testifying under oath? none of the witnesses have objection. the chair would then advise you under the rules of the house and committee you're entitled to be advised by counsel. do any of you desire to be advised by counsel? none of the witnesses say so. in that case, please rise and raise your right hand. i'll swear you in. do you swear that the testimony you're about to give is the truth, the whole truth, and nothing but the truth? thank you all. all the witnesses answered in the affirmative. you are now under oath and subject to the penalties set forth in title 18 section 1, 001 of the united states code. you may now each give a five-minute opening statement. please stick t