Data sharing policy includes:
(1) Data are openly available and can be free downloaded via the Internet.
(2) End users are encouraged to use Data subject to citation.
(3) Users, who are by definition also value-added service providers, are welcome to redistribute Data subject to written permission from the Editorial Office and the issuance of a Data redistribution license.
(4) If Data are used to compile new datasets, the ‘ten per cent principal’ should be followed such that Data records utilized should not surpass 10% of the new dataset contents, while sources should be clearly noted in suitable places in the new dataset.