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Article History

Received: 18 April 2018

Accepted: 8 October 2018

First Online: 26 October 2018

Ethics approval and consent to participate

: The use of the tumour samples and patient records in this study was approved by the Ethics Committee of Pirkanmaa Hospital District (references no. R07082, R00143), the Ministry of Social Affairs and Health, and the National Authority for Medicolegal Affairs in Finland. The need for informed consent was waived by the aforementioned authorities due to the large number of samples and the fact that a sizeable portion of the patients were already deceased. Individual patient data has not been made available and the dataset has been handled anonymized.

: Not applicable.

: None of the authors declares any conflicts of interest.

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