function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balzan, L.', 1],
    ['Beier, Max', 13],
    ['Chamberlin, Joseph Conrad', 6],
    ['Di Caporiacco, L.', 1],
    ['Feio, J. L. De Araújo', 2],
    ['Hoff, C. Clayton', 3],
    ['Kennedy, Clarice M. A.', 1],
    ['Mahnert, Volker', 1],
    ['Mahnert, Volker & Iorio, Osvaldo Di & Turienzo, Paola', 2],
    ['Romero-Ortiz, Catalina & García, Fabian & Villarreal, Eduardo', 3],
    ['Tömösváry, Ö.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);