function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Burckhardt, Daniel & Ouvrard, David & Percy, Diana M.', 3],
    ['Burckhardt, Daniel & Queiroz, Dalva L.', 11],
    ['Burckhardt, Daniel & Sharma, Anamika & Raman, Anantanarayanan', 2],
    ['Cho, Geonho & Liao, Yi-Chang & Lee, Seunghwan & Yang, Man-Miao', 2],
    ['Luo, Xinyu & Cai, Wanzhi & Qiao, Gexia', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);