• Quality control of the study: 1.1 Study monitoring and source data verification: Monitoring was done according to the monitoring plan by a representative of the investigator, who checked the case report forms for completeness and clarity, and cross-checked them with source documents. In addition to the monitoring visits, frequent communications (letter, telephone, fax, e-mail), by the study monitor ensured that the investigation was conducted according to protocol design and regulatory requirements. Study close-out was performed by the study monitor upon closure of the study.