function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carlgren, Oskar Henrik', 1],
    ['Carter, Scott', 2],
    ['Moseley, Henry Nottidge', 1],
    ['Stampar, Sergio N. & Didi, Suraia O. El & Paulay, Gustav', 2],
    ['Stampar, Sérgio N. & Mills, V. Sadie & Keable, Stephen J.', 10],
    ['Stampar, Sérgio N. & Morandini, André C.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);