Acknowledgements
André Barbosa Ribeiro, Rita Tenreiro and Emília Cortesão followed the patient.
Margarida Coucelo and Ana Teresa Simões performed the molecular studies.
Gilberto Marques performed the cytogenetic studies.
Emília Cortesão, Ana Bela Sarmento-Ribeiro and Letícia Ribeiro designed and coordinated the study.
André Barbosa Ribeiro wrote the manuscript which was critically reviewed and revised by all other authors. All authors read and approved the final manuscript.
Potential conflict of interest
Disclosure forms provided by the authors are available with the full text of this article online at https://doi.org/10.1080/10428194.2018.1443452.