@article{pena_1998,  title={Molecular Cytogenetics II: PCR-based diagnosis of chromosomal deletions and microdeletion syndromes},  volume={21},  ISSN={1415-4757},  url={https://doi.org/10.1590/S1415-47571998000400008},  DOI={10.1590/S1415-47571998000400008},  number={4},  journal={Genetics and Molecular Biology},  publisher={Sociedade Brasileira de Genética},  author={Pena, Sérgio D.J.},  year={1998},  month={Dec},  pages={453–460} }