phase contrast microscopy Article 6 controlled study 5 nonhuman 5 in vitro study 4 Eurycoma longifolia 3 Microscopy, Phase-Contrast 3 animal cell 3 cell differentiation 3 cell viability 3 enzyme activity 3 mouse 3 priority journal 3 DPC STEM 2 Microscopy, Electron, Scanning Transmission 2 Molecular mechanism 2 Osteoporosis 2 androgen receptor 2 beam scan system 2 bone morphogenetic protein 2 2 cell growth 2 cell proliferation 2 collagen synthesis 2 collagen type 1 2 comparative study 2 cytotoxicity 2 diffraction contrast 2 genotype 2 lactate dehydrogenase 2 osteoblast 2