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Effects of cell dilution on the secretion of PRL induced by different HRHs. AP cells were infused into the Cunningham chambers at four different dilutions (7.5–60 cells/μl, as shown). Averages of three replicates within a single experiment are shown. All the values obtained with the four different HRHs differed significantly (P < 0.05) from the control values. Profiles are representative of results obtained in two similar experiments. Other details are as in Fig. 4.
