function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carrenho, Renan & Rodrigues, Higor D. D.', 1],
    ['Coscarón, María Del Carmen', 1],
    ['Dursun, Ahmet & Fent, Meral', 2],
    ['Guilbert, Éric & Montemayor, Sara I.', 1],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 3],
    ['Ishikawa, Tadashi & Saito, Masayuki U. & Kishimoto-Yamada, Keiko', 4],
    ['Kment, P.', 1],
    ['María C. Melo & Gimena Dellapé & Leonela Olivera', 1],
    ['Montemayor, I. & Linnavuori, E.', 1],
    ['Montemayor, Sara & Coscarón, María Del Carmen', 5],
    ['Osborn, Herbert & Drake, Carl J.', 1],
    ['Sakenin, H. & Samin, N. & Rastegari, J. & Havaskary, M.', 1],
    ['Çerçi, Bariş & Karataş, Ahmet & Karataş, Ayşegül', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);