function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Agnèse, Jean-François & Chirio, Laurent & Legros, Olivier', 7],
    ['Ahl, E.', 5],
    ['Berkenkamp, H. O.', 4],
    ['Costa, Wilson J. E. M.', 7],
    ['Huber, Jean H.', 5],
    ['Huber, Jean H. & Radda, A. C.', 5],
    ['Nagy, Béla', 6],
    ['Paul V. Loiselle', 7],
    ['Poll, M.', 4],
    ['Radda, A. C. & Huber, Jean H.', 6],
    ['Rainer Sonnenberg', 10],
    ['Scheel, J. J.', 6],
    ['Seegers, Lothar', 5],
    ['Sonnenberg, Rainer & Busch, Eckhard', 5],
    ['Wildekamp, R. H.', 6],
    ['Other (60)', 88]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=176)',
    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);