function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ghahari, Hassan & Carpintero, Diego Leonardo & Moulet, Pierre', 3],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 1],
    ['Jansen, M. Andrew & Halbert, Susan E.', 1],
    ['Vinokurov, Nikolay N. & Rudoi, Valentin V.', 1],
    ['Yi, Wenbo & Wang, Shijun & Zhang, Hufang & Bu, Wenjun', 9],
    ['Yildirim, E. & G. Yazici & Linnavuori, R.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);