Source: https://www.mapar.org/article/1/Communication%20MAPAR/hzk7hhyu/Monitorage%20en%20r%C3%A9animation%20:%20les%20nouveaux%20param%C3%A8tres%20d%C3%A9riv%C3%A9s%20%CE%94POP%20et%20PVI.pdf