function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ball, E. D.', 2],
    ['Dmitriev, Dmitry A. & Li, Zizhong & Dai, Renhuai & Xing, Jichun', 3],
    ['Domínguez, Edwin & Godoy, Carolina', 50],
    ['Khatri, Imran & Webb, Michael D.', 1],
    ['Mozaffarian, Fariba', 2],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 2],
    ['Powell, Erin C. & Halbert, Susan E. & Deeter, Lily', 8],
    ['Ruzzier, Enrico & Lessio, Federico & Cinquatti, Francesca', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=69)',
    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);