function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Burckhardt, Daniel & Ouvrard, David', 1],
    ['Burckhardt, Daniel & Queiroz, Dalva Luiz De', 3],
    ['Burckhardt, Daniel & Sharma, Anamika & Raman, Anantanarayanan', 3],
    ['Halbert, Susan E. & Burckhardt, Daniel', 1],
    ['Luo, Xinyu & Cai, Wanzhi & Qiao, Gexia', 4],
    ['Malenovský, Igor & Burckhardt, Daniel', 38],
    ['Malenovský, Igor & Burckhardt, Daniel & Queiroz, Dalva L.', 2],
    ['Malenovský, Igor & Burckhardt, Daniel & Tamesse, Joseph L.', 10],
    ['Martin, Jon H. & Lau, Clive S. K.', 1],
    ['Percy, Diana M. & Butterill, Philip T. & Malenovský, Igor', 5],
    ['Powell, Erin C. & Halbert, Susan E. & Deeter, Lily', 1],
    ['Rendón-Mera, Diana Isabel & Serna, Francisco', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=70)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);