function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdollahi, Tandis & Jalalizand, Ali Reza & Mozaffarian, Fariba', 1],
    ['Andrea Zanetta & David Frey & Marco Moretti & Valeria Trivellone', 1],
    ['Mozaffarian, Fariba', 1],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 8],
    ['Th, Zoi N. & Lekkou, D. & Koutsogi, Terini & St, D. & Voulg, N.', 2],
    ['Zhou, Xian & Zhang, Yalin & Huang, Min', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);