function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baltazar, Juliano M. & Da Silveira, Rosa Mara B.', 1],
    ['Buyck, Bart & Eyssartier, Guillaume & Armada, François', 1],
    ['Gorjón, Sergio P. & Jesus, Maria Aparecida De', 5],
    ['Guan, Qian-Xin & Huang, Jing & Huang, Jian & Zhao, Chang-Lin', 2],
    ['Guan, Qian-Xin & Zhao, Wei & Zhao, Chang-Lin', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 13],
    ['Liu, Shi-Liang & Gafforov, Yusufjon & Zhang, Xian-Ying', 1],
    ['Rao, V. V.', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);