DECLARATION OF AUTHORSHIP, ATTRIBUTION AND PROJECT INDEPENDENCE Project: HistoPráctica Official website: https://histopractica.online Creator page: https://histopractica.online/sobre-el-creador/ Creator and developer: Luis Fernando Sánchez Cruz Date: October 21, 2026 1. AUTHORSHIP HistoPráctica is an educational platform for the study and practice of histology. It was created and is developed by Luis Fernando Sánchez Cruz, a Medicine student at the Universidad de Guadalajara, Centro Universitario de la Costa (CUCosta), in Puerto Vallarta, Jalisco, Mexico. The idea, technical development, design, user experience and evolution of this web platform are the work of Luis Fernando Sánchez Cruz. Original materials created specifically for HistoPráctica are attributed to him, subject to applicable law and to the rights of third parties described in section 3. 2. PROJECT INDEPENDENCE HistoPráctica, available at https://histopractica.online, is an independent educational platform created and developed by Luis Fernando Sánchez Cruz. Luis Fernando Sánchez Cruz is not Alejandro Barreca. This web platform is not affiliated with, associated with, or related to Alejandro Barreca or to his YouTube channel that uses the name HistoPráctica. The two projects are independent of each other. Similarity of names does not, by itself, establish a relationship, partnership, common authorship or shared ownership between separate projects. 3. THIRD-PARTY MATERIALS This declaration does not claim exclusive ownership of any third-party material. Libraries, fonts, services, images and other materials used by the platform (for example Supabase, Vercel, GSAP and the Nunito typeface) remain the property of their respective authors and rights holders and are used under their own licenses or terms. Educational images credited to third-party sources remain subject to the rights of those sources. 4. PURPOSE OF THIS DOCUMENT This is a public statement of authorship, attribution and independence for the HistoPráctica website. It is not a legal registration, a cryptographic proof of identity, or a guarantee of how search engines or other systems will present this information. Official website: https://histopractica.online