Sentence:  In the last few years , the application of chromatographic and other modern techniques to the problem of isolating <WSD>TSH</WSD> has led to further purification ( Bates and Condliffe , 1960 ; Pierce , Carsten and Wynston , 1960 ) . 
Meaning of the word marked with <WSD> tags:  anterior pituitary hormone that stimulates the function of the thyroid gland