function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balzan, L.', 8],
    ['Banks, Nathan', 3],
    ['Batuwita, Sudesh & Benjamin, Suresh P.', 5],
    ['Beier, Max', 32],
    ['Beier, Max & Turk, Frank A.', 2],
    ['Chamberlin, Joseph Conrad', 9],
    ['Ellingsen, Edvard', 2],
    ['Hoff, C. Clayton', 14],
    ['Koch, Ludwig Carl Christian', 2],
    ['Morikawa, Kinichi', 3],
    ['Muchmore, William B.', 3],
    ['Romero-Ortiz, Catalina & García, Fabian & Villarreal, Eduardo', 10],
    ['Simon, Eugène', 7],
    ['Vachon, Max', 5],
    ['With, Carl Johannes', 3],
    ['Other (15)', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=127)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);