Table 1. Cell compositions of spheroids.

	NHDFs	HESMCs	MSCs	HUVECs
Group 1	50%	50%	none	none
Group 2	50%	20%	30%	none
Group 3	50%	20%	15%	15%
Group 4	50%	20%	none	30%

NHDFs, normal human dermal fibroblasts; HESMCs, human esophagus smooth muscle cells; MSCs, human bone marrow-derived mesenchymal stem cells; HUVECs, human umbilical vein endothelial cells