function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barrion, A. T. & Litsinger, J. A.', 1],
    ['Haddad, Charles R. & Bosselaers, Jan', 3],
    ['Jin, Chi & Zhang, Hongli & Zhang, Feng', 2],
    ['Lu, Ying & Chu, Chang & Lin, Zixuan & Pham, Dinh-Sac', 2],
    ['Sankaran, Pradeep M. & Kadam, Gautam & Tripathi, Rishikesh', 3]
  ]);
  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);