Pirmary endpoint: to examine the feasibility of using an mHealth app for reporting of side effects instead of a telephone call from the hospital staff together with examining the perspectives of patients with multiple myeloma and healthcare professionals of this new method for reporting side effects, and to assess organizational aspects. Usual procedure to assess side effect prior to cancer treatment with Bortezomib is a telephone call the day before. With this innovative method investigator aimed to give the patient more independence in their daily life and in that way improve their quality of life.

It is a prospective, clinical, parallel mixed-method design with a quantitative core and a qulitative supplementary component. There will be used a Mhealth app called "My Hospital".

Quantitative data will be acquired from time registrations performed by patients and nurses and will be descriptively analyzed applying a micro-costing approach, using cost data per individual. Qualitative data will be obtained from individual, semi-structured interviews with patients and one focus group interview with healthcare professionals and will be analyzed applying a hermeneutic approach.

Eligible for inclusion were patients with MM scheduled for Bortezomib. Moreover, patients should have access to a smartphone, be able to self-report side effects of Bortezomib using a smartphone app, and be willing to participate in a semi-structured interview.

Inclusion Criteria:

• patients with MM scheduled for Bortezomib
• patients should have access to a smartphone
• patients should be able to self-report side effects of Bortezomib using a smartphone app, and be willing to participate in a semi-structured interview.

Exclusion Criteria:

• patients had to talk and read danish

Patients with Multiple Myeloma planned treatment with Bortezomib.