Clinical Research Directory

Inclusion Criteria: 1. Willing and able to provide written (or electronic) informed consent prior to study entry 2. At least 18 years of age 3. Requiring a CBC blood test as part of the patient's standard of care 4. Have abnormal laboratory results of either leukopenia, leukocytosis or neutropenia. 5. Normal skin integrity and healthy skin appearance around the capillary collection site (upper arm/shoulder area on at least one side) Exclusion Criteria: 1. Unable to give full and free consent to participate in a study due to limited capacity or risk of undue influence or coercion (including but not limited to children, prisoners, individuals with diminished decision-making capacity, illiterate or educationally disadvantaged populations) or any other individual who is unable to give full and free consent in the judgement of the investigator 2. At the determination of the treating physician, unsuitable for enrollment due to severe immunocompromised status or other comorbidities.