function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Akingbohungbe, A. E.', 7],
    ['Akingbohungbe, E.', 2],
    ['Ghahari, Hassan & Chérot, Frédéric', 3],
    ['Hosseini, Reza', 1],
    ['Jung, Sunghoon & Duwal, Ram K. & Lee, Seunghwan', 2],
    ['Kim, Junggon & Jung, Sunghoon', 5],
    ['Krüger, Andreas', 2],
    ['Linnavuori, Rauno E.', 1],
    ['Yasunaga, Tomohide & Schwartz, Michael D. & Aukema, Berend', 2],
    ['Yasunaga, Tomohide & Yamada, Kazutaka & Artchawakom, Taksin', 1],
    ['Yasunaga, Tomohide & Yamada, Kazutaka & Morakote, Rut', 1],
    ['Yeshwanth, H. M. & Chérot, F. & Henry, T. J.', 7],
    ['Çerçi, Bariş & Dursun, Ahmet', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    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);