BRL	Brightness level ratio
BSA	Bovine serum albumin
DMEM	Dulbecco’s Modified Eagle’s Medium
ECM	Extra cellular matrix
LOT	Liquid overlay technique
MCTS	Multi cellular tumor spheroid
PBS	Phosphate buffered saline
PDMS	Polydimethylsiloxane
PS	Penicilline/Streptomycin
PVA	Polyvinyl alcohol
RH	Relative humidity
SD	Standard deviation
SE	Standard error
3D	Three-dimensional
2D	Two-dimensional
WCA	Water contact angle