function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barbar, Ziad & Parker, Bruce & Skinner, Margaret', 2],
    ['Döker, İsmail', 2],
    ['Döker, İsmail & Kazak, Cengiz & Karut, Kamil', 1],
    ['Kolodochka, L. A.', 3],
    ['Ma, Min & Fan, Qing-Hai & Zhang, Zhi-Qiang', 2],
    ['Tixier, Marie-Stephane & Allam, Latifa & Douin, Martial', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);