Health Minister Cho Kyoo-hong on Monday expressed grave concerns about a decision by medical professors to resign en masse in support of junior doctors' walkout that has crippled medical services for nearly a month, Paralel.Az reports citing Yonhap.

About 90 percent of 13,000 interns and resident doctors have stayed off the job since late February in protest of the government's decision to increase enrollment at medical schools by 2,000 spots from the current 3,058.

With the labor action by junior doctors showing little signs of backing down, the emergency committee of medical professors announced Friday that faculty members from 16 medical schools will submit resignations en masse on March 25 in an effort to seek a breakthrough in the prolonged impasse.