function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bharti, Daizy & Brusa, Francisco & Kumar, Santosh', 1],
    ['João A. L. Braccini & Francisco Brusa & Ana M. Leal-Zanchet', 1],
    ['Kanana, Yuliia', 1],
    ['Larsson, Karolina & Willems, Wim', 13],
    ['Noreña, Carolina & Damborenea, Cristina & Brusa, Francisco', 33],
    ['Noreña, Carolina & Eitam, Avi & Blaustein, Leon', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=51)',
    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);