Antithrombotic Therapy and Prevention of Thrombosis, 9th ed: American College of Chest Physicians Evidence-Based Clinical Practice Guidelines - https://journal.chestnet.org/article/S0012-3692(12)60114-7/fulltext
https://emedicine.medscape.com/ - fairly easy to register and a wealth of information for both doctors and patients
https://www.mdcalc.com/ - medical calculator
https://www.accessdata.fda.gov/scripts/cder/daf/ https://www.fda.gov/ - FDA – information on, and instructions for, medicines according to evidence of evidence
https://www.ncbi.nlm.nih.gov/pubmed/ - all the world's scientific publications are collected here
https://www.isth.org/default.aspx - International Society on Thrombosis and Hemostasis – all the most interesting things about the hemostasis system, hemostasis disorders and the world registers of patients with various disorders