Fine-tuned PICO-model on test set:

           Level  F1-Score  Precision    Recall
-----------------------------------------------
       B-Patient  0.723539   0.687688  0.763333
       I-Patient  0.771008   0.736578  0.808815

  B-Intervention  0.617827   0.606715  0.629353
  I-Intervention  0.704173   0.695672  0.712885

       B-Control  0.593176   0.556650  0.634831
       I-Control  0.623557   0.639810  0.608108

       B-Outcome  0.494802   0.504237  0.485714
       I-Outcome  0.563809   0.630212  0.510065