ACP	Advance Care Planning
BMT	Bone Marrow Transplantation
EBMT	European Society for Blood and Marrow Transplantation
GvHD	Graft-versus-Host Disease
HCT	Hematopoietic Cell Transplantation
HRQoL	Health-Related Quality of Life
IG	Intervention Group
JBI	Joanna Briggs Institute
LMICs	Low- and Middle-Income Countries
LOS	Length of Stay
MMAT	Mixed Methods Appraisal Tool
OM	Oral Mucositis
PCC	Population–Concept–Context
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PRISMA-ScR	PRISMA Extension for Scoping Reviews
PRO	Patient-Reported Outcome
QOL	Quality of Life
RCT	Randomized Controlled Trial
SWiM	Synthesis Without Meta-analysis