function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Andrade-Sorcia, Gabriela & Riosmena-Rodríguez, Rafael', 5],
    ['Coppejans, Eric & Leliaert, Frederik & Verbruggen, Heroen', 1],
    ['Davidson, Alisha D. & Campbell, Marnie L. & Hewitt, Chad L.', 1],
    ['Jarvis, Charlie', 3],
    ['Marletta, Giuliana & Lombardo, Andrea', 2],
    ['Santiañez, Wilfred John E. & Lastimoso, John Michael L.', 4],
    ['Tu, Nguyen Van', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);