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Gemma Rubinos Cuadrado declares that she has no conflict of interest, Dr. Ram\u00f3n Fern\u00e1ndez \u00c1lvarez declares that he has no conflict of interest, Dra. Julia Herrero Huertas declares that she has no conflict of interest, Dra. Maria Jose Vazquez Lopez declares that she has no conflict of interest, Dra. Marta Iscar Urrutia declares that she has no conflict of interest, Dr. Pere Casan Clara declares that he has no conflict of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interests"}},{"value":"All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and\/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the Clinical Research Ethics Committee of our hospital. 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