function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Balzan, L.', 1],
    ['Batuwita, Sudesh & Benjamin, Suresh P.', 1],
    ['Beier, Max', 1],
    ['Benedict, Ellen M.', 3],
    ['Chamberlin, Joseph Conrad', 3],
    ['Cockerell, Theodore D. A.', 1],
    ['Daday, E. von', 1],
    ['Edwin, Bedoya-Roqueme & Cochett, Robin Bedoya', 1],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 2],
    ['Hoff, C. Clayton', 2],
    ['Krajcovicova, Katarina & Matyukhin, Aleksandr Vladimirovich', 3],
    ['Mahnert, Volker & Iorio, Osvaldo Di & Turienzo, Paola', 2],
    ['Mahnert, Volker & Schmidl, Jürgen', 2],
    ['Novák, János', 2],
    ['Porta, Andrés O. & Michalik, Peter & Franchi, Ezequiel', 3],
    ['Other (10)', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    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);