london chairman u.s. congressional committee investigate taxpayer fund world health organization cancer agency ask u.s. health officials release crucial document letter see reuters send thursday head national institute health nih u.s. representative jason chaffetz question whether international agency research cancer iarc try avoid public scrutiny ask experts disclose request information iarc staff immediately available comment nih spokeswoman could confirm receive letter say agency would respond arrive house committee oversight government reform chaffetz chair begin look nih link iarc last year several lawmakers raise question u.s. taxpayers fund agency often face criticism work letter mark late salvo battle congress nih iarc fuel iarc review weedkiller glyphosate iarc classify glyphosate key ingredient monsanto co herbicide roundup probably carcinogenic assessment put iarc odds many government regulators include unite state europe canada japan new zealand say unlikely pose cancer risk humans last year iarc advise academic experts glyphosate review panel disclose document ask release unite state freedom information laws chaffetz also send separate letter thursday national archive record administration office ask clarification federal record law specifically relate information send foreign body u.s. government email account iarc semi-autonomous part base lyon france assessments whether things coffee mobile phone process meat glyphosate cause cancer cause particular controversy recent years iarc critics say agency sometimes quick conclude substances might cause cancer prompt unnecessary health scar iarc however defend methods scientifically sound say monographs name give classifications carcinogens widely respect scientific rigor standardize transparent process ... freedom conflict interest chaffetz originally write nih director francis collins september last year describe iarc record controversy retractions inconsistencies ask nih annual budget 33 billion continue fund thursday follow-up letter chaffetz note iarc since tell work group members release document congressional committee chaffetz say committee want access iarc employee communications relate public record request document letter chaffetz ask response jan. 24. exclusive u.s. congressional committee demand answer cancer agency