function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bian, Xun', 1],
    ['Cadena-Castañeda, Oscar J. & Cortés-Torres, Carolina', 4],
    ['Cadena-Castañeda, Oscar J. & Gutiérrez, Yeisson & Bacca, Tito', 1],
    ['Cadena-Castañeda, Rj. & Db. Weissman', 2],
    ['Lu, Xiang-yi & Lin, Li & Liu, Jing & Liang, Li Li & Bian, Xun', 3],
    ['Lu, Xiangyi & Liu, Jing & Bian, Xun', 1],
    ['Lu, Xiangyi & Zhang, Qianwen & Bian, Xun', 1],
    ['Pang, Siyu & Lu, Xiangyi & Bian, Xun', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);