<qa>  What is the goal of the study?This study will be performed on grade IIIb and grade IV Non Small Cell Lung Cancer NSCLC chemotherapy naive patients with good performance status. In course of this study, patients will be treated with Paclitaxel in combination with either Cisplatin or Carboplatin in a maximum of six therapy cycles. The goal of this study is to determine, if a pharmakokinetic driven dose adaptation of paclitaxel leads to a reduction of of grade 4 neutropenia, compared to conventional Paclitaxel dosing, without affecting progression free survival and overall survival. 