function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ameel, Donald J.', 1],
    ['Brenes-Madrigal, Rodrigo R. & Arroyo, G. & Jimenez-Quiros, O.', 1],
    ['Chin, Ta-hsiung', 1],
    ['Grabda-Kazubska, B.', 1],
    ['Poche, F.', 1],
    ['Senger, C. M. & Macy, R. W.', 1],
    ['Webster, G. A. & Wolfgang, R. W.', 1],
    ['Xue, Xiao-Feng & Song, Zi-Wei & Hong, Xiao-Yue', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);