[In the laboratories of American specialists on poliomyelitis].
D006801:Humans; D007753:Laboratories; D011051:Poliomyelitis / Q000517:prevention & control*; D013038:Specialization; D014481:United States
LABORATORIES, MEDICAL; POLIOMYELITIS/prevention and control
V laboratoriiakh amerikanskikh spetsialistov po poliomielitu.