function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdollahi, Tandis & Jalalizand, Ali Reza & Mozaffarian, Fariba', 4],
    ['Aguin-Pombo, Dora & Freitas, Carlos', 1],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Cao, Wenjun & Xing, Jichun', 3],
    ['El-Sonbati, Saad A. & Wilson, Michael R. & Dhafer, Hathal M. Al', 8],
    ['Fieber, Franz Xaver', 1],
    ['Khatri, Imran & Webb, Michael D.', 2],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);