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We applied different treatment protocols based on the incubation of the neuroblastoma B50 rat cells with 40 mu M cisplatin : ( i ) for 48 h and harvesting of the cells at the end of the treatment ; ( ii ) further recovery in drug - free medium for 7 days post - treatment ; ( iii ) conditions as in ( ii ) followed by re - seeding in normal medium and growth for a further 4 days .
 Chemical: cisplatin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: cisplatin