@article{202104.0326,
	doi = {10.20944/preprints202104.0326.v1},
	url = {https://doi.org/10.20944/preprints202104.0326.v1},
	year = 2021,
	month = {April},
	publisher = {Preprints},
	author = {Valeria Stati and Chiara Lauri and Michela Varani and Martina Conserva and Alberto Signore},
	title = {PET and SPECT Imaging of Tumor Micro-Environment: A Systematic Review of the Last 20 Years},
	journal = {Preprints}
}