Humans human 123 cytology 100 metabolism 54 Article 43 cell culture 40 Cells, Cultured 38 female 36 physiology 34 Female 33 controlled study 33 drug effect 33 male 33 adult 31 genetics 30 Male 28 human cell 24 cell proliferation 23 procedures 23 Animals 21 Cell Proliferation 21 animal 21 pathology 21 Adult 20 cell differentiation 20 in vitro study 20 Cytology 18 Dental Pulp 18 gene expression 18 tooth pulp 18