function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dijkstra, Klaas-Douwe B. & Kalkman, Vincent J. & Dow, Rory A.', 1],
    ['Grand, Daniel & Marinov, Milen & Jourdan, Herve & Cook, Carl', 1],
    ['J. A. L. Watson & M. S. Moulds', 4],
    ['Kosterin, O. E.', 6],
    ['Kosterin, Oleg E. & Garrison, Rosser & Kompier, Tom', 1],
    ['Phan, Quoc Toan & To, Van Quang & Payra, Arajush', 1],
    ['Seehausen, Malte', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);