function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bor, Norman Loftus', 1],
    ['Jansen, Pieter', 1],
    ['Jarvis, Charlie', 1],
    ['Korthof, H. M. & Veldkamp, Jan Frederik', 1],
    ['Paszko, Beata & Chen, Wen-Li & Szczepaniak, Magdalena', 2],
    ['Paszko, Beata & Pendry, Colin', 2],
    ['Paszko, Beata & Soreng, Robert J.', 1],
    ['Royen, Pieter van', 2],
    ['Sylvester, Steven P. & Soreng, Robert J.', 2],
    ['Veldkamp, Jan Frederik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);