Copyright, licensing, and reuse

The educational research tools published on this site are designed and developed by Heidi Andersén (Vahtian) and provided to the Nordic Thoracic Oncology Group (NTOG) for educational use. They are published to support transparent scientific discussion, education, research planning, and local adaptation.

Authorship and copyright

Unless otherwise stated, the tools, their concept, source code, and accompanying documentation are © 2026 Heidi Andersén / Vahtian. NTOG hosts the tools for educational use; hosting does not transfer ownership.

Software license

Unless otherwise stated, calculator source code, HTML, CSS, and JavaScript authored for these tools are licensed under the Apache License, Version 2.0 (© Heidi Andersén / Vahtian).

Educational content license

Unless otherwise stated, explanatory text, method descriptions, and non-software documentation are licensed under Creative Commons Attribution 4.0 International.

NTOG name and branding

The NTOG name, Nordic Thoracic Oncology Group name, logo, visual identity, event branding, and associated marks are not licensed for reuse. They may not be used to imply endorsement, affiliation, certification, or clinical approval without written permission.

Clinical and educational boundary

These tools are educational and research resources. They are not medical devices, not autonomous clinical decision systems, not diagnostic tools, and not substitutes for national guidelines, local clinical protocols, formal health-economic assessment, reimbursement decisions, multidisciplinary team review, clinical judgment, or patient preference.

Published models and third-party methods

Published clinical models, guidelines, trial data, health-economic frameworks, and third-party calculators cited or implemented in these tools remain attributable to their original authors, journals, societies, institutions, or publishers. NTOG implementation or discussion does not imply endorsement by the original authors or organisations.

Citation

If these tools are used in scientific work, cite the exact version used, the archived software release DOI if available, and the underlying model, guideline, or trial publications relevant to the analysis.