function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Köhler, Frank & Holford, Mande & Do, Van-Tu & Ho, Thanh-Hai', 4],
    ['Marwoto, Ristiyanti M. & Isnaningsih, Nur R.', 4],
    ['Ng, Ting Hui & Dulipat, Jasrul & Foon, Junn Kitt', 1],
    ['Ng, Ting Hui & Jeratthitikul, Ekgachai & Sutcharit, Chirasak', 1],
    ['Wang, Chong-Rui & Suo, Wen-Wen & Huang, Xiang-Rong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);