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  1. Serotonin neurotransmitter molecule
  2. Action of serotonin reuptake inhibitors
  3. Synapses, artwork
  4. Virus particles entering cells, artwork
  5. Molecular model
  6. Human skull
  7. Blood cells in blood vessel, artwork
  8. DNA replication, artwork
  9. Coronary artery disease
  10. Viral throat infection, artwork
  11. Cells
  12. Dendritic cells, artwork
  13. Virus particles, artwork
  14. Fertilisation, artwork
  15. Retina in glaucoma, artwork
  16. Detached blood clot, artwork
  17. Bacterial lung infection
  18. Toothache, conceptual artwork
  19. Rod-shaped bacteria, artwork
  20. Nerve damage and stem cells, artwork