function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, A-Min & Pei, Yun & Wen, Ting-Chi', 1],
    ['Crop, Eske De & Lescroart, Jonas & jouonkou, Andre-Ledoux', 1],
    ['Dierickx, Glen & Froyen, Marie & Halling, Roy', 2],
    ['Ghosh, Aniket & Bera, Ishika & Chakraborty, Dyutiparna', 1],
    ['Montoya, Leticia & Caro, Abraham & Ramos, Antero', 2],
    ['de la Fuente, Javier Isaac & García-Jiménez, Jesús', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);