1 Division of Infectious Diseases, Koo Foundation Sun Yat-Sen Cancer Center, Taipei 112, Taiwan; Division of Infection Control, Koo Foundation Sun Yat-Sen Cancer Center, Taipei 112, Taiwan. Electronic address: leon.wtc@gmail.com.
2 Division of Infection Control, Koo Foundation Sun Yat-Sen Cancer Center, Taipei 112, Taiwan.
3 Division of Infectious Diseases, Koo Foundation Sun Yat-Sen Cancer Center, Taipei 112, Taiwan; Division of Infection Control, Koo Foundation Sun Yat-Sen Cancer Center, Taipei 112, Taiwan.