CAM	Complementary and alternative medicine
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
AMSTAR	Assessing the methodological quality of systematic reviews
RCT	Randomized controlled trial
CHM	Chinese herbal medicine
ME	Mistletoe extract
AHCC	Active hexose correlated compound
NA	Not available
NRS	Numeric rating scale
TEAS	Transcutaneous electrical acupoint stimulation
Nab-P + G	Nanoparticle albumin-bound paclitaxel plus gemcitabine
WHO	World Health Organization
PROMs	Patient-reported outcomes