Assessing opportunities and barriers to improving the secondary use of health care data at the national level : multicase study in the Kingdom of Saudi Arabia and EstoniaMetsallik, Janek; Draheim, Dirk; Sabic, Zlatan; Novak, Thomas; Ross, PeeterJournal of Medical Internet Research2024 / art. e53369 https://doi.org/10.2196/53369 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS