PATIENT INCLUSION AND DATA COLLECTION Patient inclusion will take place during three consecutive months. Patients are included within the first day of hospital admittance. Each day, members of the project group will screen all patients admitted within the last day and personally contact those eligible for inclusion. Patients will be informed verbally and given the written participant information. Patients will be given time for consideration and if they accept participation, they will be asked to sign the consent form. Due to the project design, according to which the first blood samples are to be taken within the first day of hospitalization, patients are asked to consent to project participation on the day of initial contact with the research group member. Conversations will be held in a private setting in the department, and patients are invited to bring relations, if they so prefer.