@article{schechter_lemme_novais_biccas_2011,  title={Achalasia in the elderly patient: a comparative study},  volume={48},  ISSN={0004-2803},  url={https://doi.org/10.1590/S0004-28032011000100005},  DOI={10.1590/S0004-28032011000100005},  number={1},  journal={Arquivos de Gastroenterologia},  publisher={Instituto Brasileiro de Estudos e Pesquisas de Gastroenterologia e Outras Especialidades - IBEPEGE. },  author={Schechter, Rosana B. and Lemme, Eponina M. O. and Novais, Paula and Biccas, Beatriz},  year={2011},  month={Jan},  pages={19–23} }