Recommendation 4...The first- and second-line treatment of unresectable mesothelioma...Anti-folate/platinum doublet is the only approved standard of care...Combination doublet chemotherapy of cisplatin, with either pemetrexed or raltitrexed, has shown a longer survival compared with cisplatin alone…Carboplatin is an acceptable alternative to cisplatin and may be better tolerated in the elderly population.