Figure 2 from: Loukanov A, Nikolova S, Filipov C, Nakabayashi S (2019) Nanomaterials for cancer medication: from individual nanoparticles toward nanomachines and nanorobots. Pharmacia 66(3): 147-156. https://doi.org/10.3897/pharmacia.66.e37739 - Loukanov, Alexandre (2019)