Prospective research to study the relationship between concentrations of metals/metalloids in blood, hair and lung tissue with the occurence of lung cancer or chronic obstructive pulmonary disease.

Inclusion Criteria:

• Patients of 18 to 75 years of age.
• Patients admitted for lung resection (either cancerous or non-cancerous) or lung transplant

Exclusion Criteria:

• Patients with mental or physical conditions that prevent them giving their agreement for the study