function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cornelis, Marcela & Quirán, Estela & Coscarón, María C', 1],
    ['Ghahari, Hassan & Moulet, Pierre & Linnavuori, Rauno E.', 1],
    ['Heiss, Ernst & Eckelt, Andreas & Lederwasch, Manfred', 4],
    ['Ishikawa, Tadashi & Saito, Masayuki U. & Kishimoto-Yamada, Keiko', 2],
    ['Krüger, Andreas & Deckert, Jürgen', 2],
    ['Linnavuori, Rauno E.', 2],
    ['María C. Melo & Gimena Dellapé & Leonela Olivera', 1],
    ['Melo, M. C. & Montemayor, S. I.', 2],
    ['Pall, José Luis & Coscarón, María del Camen', 3],
    ['Yildirim, E. & G. Yazici & Linnavuori, R.', 1],
    ['Yildirim, E. & Yazici, G. & Moulet, P.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    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);