function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bachvarova, Darina & Vagalinski, Boyan & Doichinov, Aleksandar', 6],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Decker, Peter & Reip, Hans Simon & Voigtlaender, Karin', 6],
    ['Djursvoll, Per', 4],
    ['F. Silvestri', 1],
    ['Gilgado, José D. & Ortuño, Vicente M.', 4],
    ['Golovatch, Sergei I. & Wesener, Thomas', 3],
    ['Haľkova, Beata & Drabova, Martina & Mock, Andrej', 10],
    ['Hollier, John & Stöckli, Eduard & Wesener, Thomas', 1],
    ['Humbert, Alois & Saussure, Henri de', 1],
    ['John Hollier & Edmund Schiller & Nesrine Akkari', 2],
    ['K. W. Verhoeff', 4],
    ['Korobushkin, Daniil I. & Semenyuk, Irina I. & Tuf, Ivan H.', 2],
    ['Nguyen, Anh D. & Vu, Tam T. T. & Eguchi, Katsuyuki', 2],
    ['R. Latzel', 3],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    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);