One of the authors, Jonathan Roth, is quoted at length in a news article on the particular effect this ban may have in Los Angeles: Hundreds of doctors in LA County could be affected by new travel ban
"The executive order, which is due to go into effect on Thursday, temporarily blocks visas from being issued to citizens of Iran, Libya, Somalia, Syria, Sudan and Yemen to "to protect the Nation from terrorist activities by foreign nationals." The ban does not include permanent residents and those who already have visas, but doctors applying for new visas or seeking to renew expired ones would require a waiver. Several states are challenging the order's constitutionality in court.
You can here a brief interview with Jonathan R. here: http://www.byuradio.org/episode/01e0c780-5621-4307-ba99-954c81776308?playhead=2440&autoplay=true