function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aston, Paul', 1],
    ['Azadbakhsh, Saeed & Nozari, Jamasb', 1],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 1],
    ['Bates, Henry Walter', 1],
    ['Bonelli, Franco Andrea', 1],
    ['Bousquet, Yves', 31],
    ['Hoess, René', 2],
    ['Hristovski, Slavčo & Guéorguiev, Borislav', 5],
    ['Kostova, Rumyana & Gueorguiev, Borislav', 2],
    ['Larochelle & Larivière, Marie-Claude', 2],
    ['Liebherr, James K.', 43],
    ['Liebherr, James K. & Ivie, Michael A.', 4],
    ['Liebherr, James K. & Will, Kipling W.', 3],
    ['Merene, Yeshitla & Lorenz, Wolfgang & Opgenoorth, Lars', 4],
    ['Pérez-Hernández, Cisteil Xinum', 3],
    ['Other (8)', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=112)',
    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);