@article{plapler_2006,  title={Hemorrhoids: an experimental model in monkeys},  volume={21},  ISSN={0102-8650},  url={https://doi.org/10.1590/S0102-86502006000500014},  DOI={10.1590/S0102-86502006000500014},  number={5},  journal={Acta Cirúrgica Brasileira},  publisher={Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia},  author={Plapler, Hélio},  year={2006},  month={Sep},  pages={354–356} }